1) cut bagels and spread thin layer of butter on them.
2) place them in oven and heat till the butter melts.
3) take the warm bagels out and spread prego sauce on them
4) warm up your diced meat on a skillet or pan
5) place the meat on top of the sauce
6) place shredded cheeses and mushrooms on top of the meat and sauce.
7) place back in oven and heat till the cheese starts to slightly bubble.